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diff --git a/macros/latex/contrib/bondgraph/bondgraph_arrows.tex b/macros/latex/contrib/bondgraph/bondgraph_arrows.tex
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+%% bondgraph_arrow.tex
+%% Copyright (c) 2010, Jean-Francois Dupuis
+%
+% This work may be distributed and/or modified under the
+% conditions of the LaTeX Project Public License, either version 1.3
+% of this license or (at your option) any later version.
+% The latest version of this license is in
+% http://www.latex-project.org/lppl.txt
+% and version 1.3 or later is part of all distributions of LaTeX
+% version 2005/12/01 or later.
+%
+% This work has the LPPL maintenance status `maintained'.
+%
+% The Current Maintainer of this work is Jean-Francois Dupuis.
+%
+% This work consists of the files bondgraph.sty, bondgraph_arrows.tex
+% and bondgraph_example.tex.
+
+\pgfarrowsdeclare{left to}{left to}
+{
+ \pgfutil@tempdima=-0.84pt%
+ \advance\pgfutil@tempdima by-1.3\pgflinewidth%
+ \pgfutil@tempdimb=0.21pt%
+ \advance\pgfutil@tempdimb by.625\pgflinewidth%
+ \pgfarrowsleftextend{+\pgfutil@tempdima}
+ \pgfarrowsrightextend{+\pgfutil@tempdimb}
+}
+{
+ \pgfutil@tempdima=0.28pt%
+ \advance\pgfutil@tempdima by.3\pgflinewidth%
+ \pgfsetlinewidth{0.8\pgflinewidth}
+ \pgfsetdash{}{+0pt}
+ \pgfsetroundcap
+ \pgfsetroundjoin
+ \pgfpathmoveto{\pgfqpoint{-3\pgfutil@tempdima}{4\pgfutil@tempdima}}
+ \pgfpathcurveto
+ {\pgfqpoint{-2.75\pgfutil@tempdima}{2.5\pgfutil@tempdima}}
+ {\pgfqpoint{0pt}{0.25\pgfutil@tempdima}}
+ {\pgfqpoint{0.75\pgfutil@tempdima}{0pt}}
+ \pgfpathcurveto
+ {\pgfqpoint{0.55\pgfutil@tempdima}{-0.125\pgflinewidth}}
+ {\pgfqpoint{0.5\pgfutil@tempdima}{-0.125\pgflinewidth}}
+ {\pgfqpoint{0.5\pgfutil@tempdima}{-0.125\pgflinewidth}}
+ \pgfpathlineto{\pgfqpoint{0pt}{-0.125\pgflinewidth}}
+ \pgfusepathqstroke
+}
+
+\pgfarrowsdeclare{|}{|}
+{
+ \pgfarrowsleftextend{+-0.25\pgflinewidth}
+ \pgfarrowsrightextend{+.75\pgflinewidth}
+}
+{
+ \pgfutil@tempdima=2pt%
+ \advance\pgfutil@tempdima by1.5\pgflinewidth%
+ \pgfsetdash{}{+0pt}
+ \pgfsetrectcap
+ \pgfpathmoveto{\pgfqpoint{0.25\pgflinewidth}{-\pgfutil@tempdima}}
+ \pgfpathlineto{\pgfqpoint{0.25\pgflinewidth}{\pgfutil@tempdima}}
+ \pgfusepathqstroke
+}